/*
 * Copyright (C) 2024 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the 'License');
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an 'AS IS' BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef IMAGE_KNIFE_C_KEKE_PROMISE_FUNCTION_H
#define IMAGE_KNIFE_C_KEKE_PROMISE_FUNCTION_H

#include "promise.h"
#include "task_worker.h"
#include <functional>

namespace ImageKnifePro {

template<typename T>
class PromiseFunction : public Promise<T> {
public:
    explicit PromiseFunction(std::function<void(T)> func) : func_(func)
    {
    }
private:
    std::function<void(T)> func_ = nullptr;

    void SetValue(T value) override
    {
        if (func_ == nullptr) {
            return;
        }

        if (TaskWorker::GetInstance()->IsMainThread()) {
            func_(value);
        } else {
            auto self = std::static_pointer_cast<PromiseFunction<T>>(this->shared_from_this());
            TaskWorker::GetInstance()->ToMainThread([self, value](void *) {self->func_(value);}, nullptr);
        }
    }
};

template <>
class PromiseFunction<void> : public Promise<void> {
public:
    explicit PromiseFunction(std::function<void()> func) : func_(func)
    {
    }
private:
    std::function<void()> func_ = nullptr;

    void SetValue() override
    {
        if (func_ == nullptr) {
            return;
        }

        if (TaskWorker::GetInstance()->IsMainThread()) {
            func_();
        } else {
            auto self = std::static_pointer_cast<PromiseFunction<void>>(this->shared_from_this());
            TaskWorker::GetInstance()->ToMainThread([self](void *) {self->func_();}, nullptr);
        }
    }
};

}

#endif //IMAGE_KNIFE_C_KEKE_PROMISE_FUNCTION_H
